There is an “all rights reserved” copyright message on the hacked page assigning rights to “Turk Muslim Hacker can not be imitated”.

All of the targeted web pages were defaced with the same message and while they have been pulled offline, the attacks have been archived by Zone-H.org.

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A NSW SES spokesman said an investigation was underway but the websites that were attacked were hosted on a different server to the one that hosts the main SES site. He said the attack appeared to have occurred on Friday.

“We are in the process of transitioning our SES units across to the state-wide server, which is a more secure one,” the spokesman said.

The creator of the YouTube video, alternately titled “Innocence of Muslims” or “The Real Life of Muhammad”, was arrested last week for violating terms of his probation.

His 14-minute clip sparked protests around the world, which have reportedly led to the deaths of dozens of people. YouTube refused to remove the clip from its site but has blocked access to the video in some countries in the Middle East after court rulings.